We need to do something about this now because billions of fish are killed globally for food as if they don't care about what happens to them. As Robert Jones of the Department of Philosophy at California State University, Chico, notes in his essay called "Fish sentience and the precautionary principle,"... "If fish are sentient (and there is good evidence that they are), then the number of sentient beings in the form of fish that are slaughtered for food annually equals at least twelve times that of the current human population (Mood & Brooke 2010). If the idea of such a moral atrocity weren't enough, current world fishing trends point to a global eradication of all taxa currently fished, causing a total collapse of the fishing industry by the year 2048 (Worm et al. 2006). Surely, by any moral calculus, applying the precautionary principle regarding fish welfare is reasonable and prudential, if not obligatory."